HMSR Series - High Insulated Integrated Current Sensor

The best solution for harsh environments

Available in both analog and digital ∆∑ bitstream outputs

The HMSR family is the latest range of Integrated Current Sensors by LEM. It was designed for our customers to get all the benefits from an ICS but with a new isolation concept that allows unique robustness.

HMSR allows 4.95kV guaranteed and characterized up to 5.66kV in laboratory. The family has a pre-mold design to isolate the primary bar and a special footprint to allow 8mm dCp/dCI on the landing pad. The integrated micro core inside the HMSR makes it very immune to external magnetic field and great accuracy. It is ideal for applications in solar DC side, chargers, etc.

Combines performance with incredible robustness

HMSR SMS

HMSR Series

Key features

  • Open loop multi-range current sensor
  • Voltage output
  • Double overcurrent detection
  • Single power supply +5 V
  • Galvanic separation between primary and secondary
  • Low power consumption
  • Compact design for surface mount PCB mounting
  • Factory calibrated
  • High bandwidth, very low loss magnetic core

Applications

  • Small drives
  • HVAC inverters
  • Appliances
  • Solar inverters

HMSR SMS at a glance

Product name Nominal
sensitivity [mV/A]
Current
measurement
range [Apeak]
Nominal
current [Arms]1
Supply Voltage [Uc] Ratiometric
Voltage output
Temp. range [°C]
HMSR 6-SMS 133,33 ± 15 ± 6 5V No -40 to 125°C
HMSR 8-SMS 100 ± 20 ± 8 5V No -40 to 125°C
HMSR 10-SMS 80 ± 25 ±10 5V No -40 to 125°C
HMSR 15-SMS 53,33 ± 37.5 ±15 5V No -40 to 125°C
HMSR 20-SMS 40 ± 50 ± 20 5V No -40 to 125°C
HMSR 30-SMS 26,67 ± 75 ± 30 5V No -40 to 125°C
The first Integrated Current Sensor with digital output

HMSR DA

HMSR DA Integrated current sensor

HMSR DA is the 1st integrated current sensor with a Sigma Delta bitsream output. Capable of reaching up to 13 bits of effective resolution, the HMSR DA will be the perfect fit for your low noise current sensing needs.

Key features

  • Replaces shunt and digital isolator for reduced cost and footprint
  • Offers efficient performance for servo drives, robotics and other high precision applications
  • Sigma Digital bitstream output with 10 MHz clock in or out
  • High resolution with an effective number of bits (ENOB) 11 to 13 bits
  • Different output modes: Single ended CMOS, Differential RS422, LVDS
  • Fast internal OCD of 2 µs

Applications

  • Small drives
  • HVAC Inverters
  • Appliances
  • Solar Inverters.
Download

Technical documentation

VIDEO

HMSR DA, the first ICS with Sigma Delta bitstream ouput

HMSR DA at a glance

Product name Nominal
Sensitivity [%/A]
Current
measurement
range [Apeak]
Nominal
current [Arms]1
Supply
Voltage [Uc]
Output Mode Temp. range [°C]
HMSR DA 10/4– 50000 4 ± 10 ±4 5V 2W CMOS CLK Out -40 to 125°C
HMSR DA 10/4 – 54000 4 ± 10 ±4 5V 4W RS 422 CLK Out -40 to 125°C
HMSR DA 15/6 – 50000 2,666 ± 15 ±6 5V 2W CMOS CLK Out -40 to 125°C
HMSR DA 15/6 – 54000 2,666 ± 15 ±6 5V 4W RS 422 CLK Out -40 to 125°C
HMSR DA 25/10 – 50000 1,6 ± 25 ±10 5V 2W CMOS CLK Out -40 to 125°C
HMSR DA 25/10 – 54000 1,6 ± 25 ±10 5V 4W RS 422 CLK Out -40 to 125°C
HMSR DA 75/30 – 50000 0,533 ± 75 ±30 5V 2W CMOS CLK Out -40 to 125°C
HMSR DA 75/30 – 54000 0,533 ± 75 ±30 5V 4W RS 422 CLK Out -40 to 125°C

Standards & Certificates

HMSR Series
IEC 61800-5-1: 2007
IEC 62109-1: 2010
IEC 60950-1: 2005
UL 1577: 2014 (pending)